High-fidelity and robust optomechanical state transfer based on pulse control

The extended lifespan of mechanical oscillator enables its utilization as a reliable medium for information storage. Optomechanical system coupling the cavity mode with mechanical oscillator is a promising device that can transfer the information from the light field to the mechanical oscillator for storage. In this paper, we propose an efficient scheme for quantum state transfer between the optical mode and mechanical oscillator by introducing pulsed coupling to an optomechanical system. By analyzing all the second-order moments, we give a general condition for the pulsed coupling that can guarantee the optomechanical state conversion stably. Then, we take a Gaussian-type pulsed coupling as an example to examine the analysis and show that the state initially prepared in optical mode can be transferred to the mechanical mode stably with high fidelity for storage. Moreover, our scheme exhibits high robustness against the thermal fluctuation of mechanical mode, as well as the variations in the control pulse.